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Finding the Fourth Proportional to 724,697.55, 999,978.62 and 402,411.51

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Solution

The fourth proportional to 724,697.55, 999,978.62 and 402,411.51 is: 555,270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,697.55 : 999,978.62 = 402,411.51 : x
  2. Step 2: Convert to fraction form
    724,697.55/999,978.62 = 402,411.51/x
  3. Step 3: Cross multiply
    724,697.55x = 999,978.62 × 402,411.51
  4. Step 4: Simplify right side
    724,697.55x = 402,402,904,429.86
  5. Step 5: Solve for x
    x = 402,402,904,429.86/724,697.55
  6. Step 6: Final answer
    x = 555,270.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.